1145310913 has 8 divisors (see below), whose sum is σ = 1188395432. Its totient is φ = 1102864896.

The previous prime is 1145310911. The next prime is 1145310979. The reversal of 1145310913 is 3190135411.

It can be written as a sum of positive squares in 4 ways, for example, as 82029249 + 1063281664 = 9057^2 + 32608^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145310913 - 2¹ = 1145310911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145310911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155970 + ... + 163147.

It is an arithmetic number, because the mean of its divisors is an integer number (148549429).

Almost surely, 2^1145310913 is an apocalyptic number.

It is an amenable number.

1145310913 is a deficient number, since it is larger than the sum of its proper divisors (43084519).

1145310913 is an equidigital number, since it uses as much as digits as its factorization.

1145310913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319251.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1145310913 is about 33842.4424798211. The cubic root of 1145310913 is about 1046.2636401964.

It can be divided in two parts, 11453 and 10913, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 1145310913 in words is "one billion, one hundred forty-five million, three hundred ten thousand, nine hundred thirteen".